The main technical indicators of RKC thermostat
· Input: various thermocouple (TC), RTD standard current and voltage signals (see input type table);
· basic error: 0.5% of the input full-scale ±±1 word;
· Resolution: 1°C, 0.1°C;
· Sampling period: 3 times/sec
· Alarm function: upper limit, lower limit, upper deviation, lower deviation, in the interval, outside the interval;
· Alarm output: relay contact AC250V 3A (resistive);
· Control output: relay contact AC250V 3A (resistive), logic level C 0/12V (with solid state relay SSR), zero-crossing trigger pulse: photocouple thyristor output 1A600V 0-10mA current output (load resistance below 600Ω), 0-20mA current output (load resistance below 600Ω), 4-20mA current transmission (load resistance below 600Ω);
· Control mode: fuzzy PID control, bit control;
· Power supply voltage: AC85-264V(50/60Hz)(rated 100-240V AC) 21.6-26.4V AC(rated 24V AC) 21.6-26.4V DC(rated 24V DC);
· working environment: non-corrosive occasions with temperature of 0-50°C and temperature <85%RH. Power consumption< 5VA;
· panel size: 80X160, 160X80, 96X96, 72X72, 96X48, 48X96, 48X48mm.
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The working principle of dry-type transformer thermostats
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The two-wire system and the three-wire system are measured by the bridge method, and the relationship between the temperature value and the analog output value is given after ***. There is no bridge on the four wires, it is completely just sent with a constant current source, measured by a voltmeter, and the test is given after *** ...
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Bellows or diaphragm air conditioner thermostat
Fault Symptom:
Poor contact or burning, resulting in the circuit cannot be connected; The frequent action of the contact arc and sticking causes the circuit to be unbreakable; Leakage of thermostat in the temperature sensing chamber, causing the contacts to fail to operate and lose control ...
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Common faults of thermostats
1. There is no display when the power is on. This type of problem first determines whether the power supply is available and whether the power supply matches the power supply required by the thermostat, and then checks whether the wiring is secure. The problem is still there, then it is the problem of the thermostat itself.
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1. There is no liquid level display or lower liquid level display
When the sewage is discharged, only a small amount of condensate flows out, and it is judged that the pontoon is blocked.
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RKC Thermostat Usage Warning
· Wiring warning:
- If the instrument fails or an error occurs, which can cause a system failure, install external protection circuits to prevent such accidents;
- To prevent damage or failure of the instrument, use appropriate fuses to protect the power cord and input/output cord from strong power shocks.
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Analyze the causes
1. Wrong wiring
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3. Whether the cable between the panel and the power board is broken or plugged incorrectly
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RKC Thermostat – How can a thermostat be broken?
First, the temperature does not appear
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If the temperature probe of the temperature sensor breaks or the wire is broken, the sensor does not have a digital display when the temperature sensor is connected, but only shows the "----" and sounds an alarm.
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Precautions for the use of RKC thermostats
fold
When the RKC thermostat comes out, it is a single-loop regulator, that is, it only has a heating function, which is called the basic meter, which is generally sent to the agent, and the agent will expand the multi-channel adjustment and alarm output control function, which is called "changing the meter" in the industry, so as to ensure that there is very little hardware cost.
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RLC Thermostat – Instructions for installation and use of pop-up thermostats
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Analyze the causes
1. Wrong wiring;
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Wiring method of the RKG thermostat
Take CD901 as an example,
L(1) pin to 220 volt live wire,
N(2) pin 220 volt neutral wire,
3,4 pins for *** output,
5,6 pins for the second output,
7, 8, 9 pins are alarm output,
The rear three pins are connected to thermocouples or PT100 and so on.
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Common faults in the use of RKC thermostat Pt100 RTD
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